指令错误$ rootScope:infdig无限$ digest循环 [英] Directive error $rootScope:infdig Infinite $digest Loop

问题描述

我下载了一条指令，该指令仅接收数字并具有一些其他选项；但是，运行它之后，在以下选项之一中出现了rootScope错误:

I downloaded a directive that receives only numbers and has some additional options; but, after running it I get a rootScope error in one of the options that is:

<input type="text"  ng-model="mynumber" nks-only-number allow-decimal="false" />

我相信错误的条件使此错误出现，但我不知道为什么.

I believe the false conditional is making this error appear, but I don't know why.

这是演示: http://jsfiddle.net/RmDuw/896/

代码:

(function(){
    angular.module('myApp', [])
      .directive('nksOnlyNumber', function () {
        return {
          restrict: 'EA',
            require: 'ngModel',
            link: function (scope, element, attrs, ngModel) {   
               scope.$watch(attrs.ngModel, function(newValue, oldValue) {
                  var spiltArray = String(newValue).split("");

                  if(attrs.allowNegative == "false") {
                    if(spiltArray[0] == '-') {
                      newValue = newValue.replace("-", "");
                      ngModel.$setViewValue(newValue);
                      ngModel.$render();
                    }
                  }

                  if(attrs.allowDecimal == "false") {
                      newValue = parseInt(newValue);
                      ngModel.$setViewValue(newValue);
                      ngModel.$render();
                  }

                  if(attrs.allowDecimal != "false") {
                    if(attrs.decimalUpto) {
                       var n = String(newValue).split(".");
                       if(n[1]) {
                          var n2 = n[1].slice(0, attrs.decimalUpto);
                          newValue = [n[0], n2].join(".");
                          ngModel.$setViewValue(newValue);
                          ngModel.$render();
                       }
                    }
                  }


                  if (spiltArray.length === 0) return;
                  if (spiltArray.length === 1 && (spiltArray[0] == '-' || spiltArray[0] === '.' )) return;
                  if (spiltArray.length === 2 && newValue === '-.') return;

                    /*Check it is number or not.*/
                    if (isNaN(newValue)) {
                      ngModel.$setViewValue(oldValue || '');
                      ngModel.$render();
                    }
                });
            }
        };
    });
}());

推荐答案

我认为问题在于查看粘贴的代码(不是J​​SFiddle)，是ngModel.$render()被调用了两次.如果我将其从attrs.allowDecimal == false条件或结尾isNaN(newValue)条件中删除，则代码可以正常运行.

I believe the problem, looking at your pasted code (not the different JSFiddle), is that ngModel.$render() gets called twice. If I delete it from either the attrs.allowDecimal == false conditional or the end isNaN(newValue) conditional, the code runs fine.

由于我不确定您的最终目标是什么，因此我忽略了实际重写您的代码的方法.但是，这解决了无限的$digest循环错误.

Since I'm not sure what your end goal is, I've neglected to actually rewrite your code. But, that solved the infinite $digest loop error.

这篇关于指令错误$ rootScope:infdig无限$ digest循环的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！